Generate iCloud Backup manually

Backup Failed - Not enough Storage?

Disable photo backup or other apps backup to save storage:Step 1:Go to Settings > iCloud > Storage > Manage Storage.Step 2: Select the device you want to manage the backup for ("This iPhone," for example).Step 3: Under "Backup Options," toggle apps off that you do not want to sync to iCloud. As previously noted, Photo Library usually is the biggest culprit.